DEPARTMENT OF ETHOLOGY AND ECOLOGY Head of ... - DPZ

Farbprofil: Generisches Offset-Separations-Profil
Schwarz 150 lpi bei 45 Grad
Progress during period under report
Results
In the past year, we made important progress on a number of fronts. In Madagascar,
Oliver Schülke succeeded in capturing and radiocollaring fork-marked lemurs,
so that it is now possible to initiate a field study of this intriguing lemur. Julia
Ostner developed the necessary methodology for her study of the socio-endocrinology
of redfronted lemurs. Barbara Wimmer developed the genetic tools necessary for the
analyses of kin relations in several lemur species. Preliminary results of Rodin
Rasoloarison's thesis work indicate the existence of at least four species of mouse lemurs
that are new to science.
Scent marking events / hour
0,7
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p < 0.01
Department of Ethology and Ecology
Male Female
Different aspects of olfactory communication were addressed in coordinated comparative
studies in tamarins and lemurs. Moustached tamarins (left graph) show a pronounced
sexual dimorphism in favour of females with regard to scent marking (from:
Heymann, E.W. (1998): Behav. Ecol. Sociobiol. 43:40). Latency of reaction of male
and female recipients to three different types of scent marks in Lemur catta (right
hand graph). Mean latencies (+SE) between deposition of female anogenital (Female
AG), male anogenital (Male AG) and male antebrachial (Male AB) scent marks and
first reaction with the same signal in male (black bars) and female (hatched bars) recipients
are shown. The type of scent mark, but not sex of recipient, significantly influences
mean latency. In a two-way ANOVA, the interaction (type x sex of recipient) was
not significant (from: Kappeler, P.M. (1998): Behav. Ecol. Sociobiol. 42:411).
Considerable progress was also made in the research carried out in Peru. Emerita
Tirado succeeded in habituating red titi monkeys, Callicebus cupreus, so that a new
comparative study of their behavioral ecology can now be initiated. The comparisons
with the completed studies by Stefanie Heiduck on Brazilian masked titi monkeys,
Callicebus personatus, and the ongoing studies on moustached and saddle-back
tamarins (Saguinus mystax, Saguinus fuscicollis) provide an opportunity to elucidate
the relative importance of ecological and phylogenetic factors in the evolution of
specific socio-ecological adaptations. Christoph Knogge and Emerita Tirado finished
Primate Report 54, July 1999 53
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